Navidea Biopharmaceuticals (NAVB)’ Lymphoseek® (technetium Tc 99m tilmanocept) Injection Demonstrates Preferential Accumulation In Tumor-Positive Sentinel Lymph Nodes In Post-Hoc Analysis
6/11/2014 8:09:25 AM
DUBLIN, Ohio--(BUSINESS WIRE)--Navidea Biopharmaceuticals, Inc. (NYSE MKT:NAVB), a biopharmaceutical company focused on precision diagnostic radiopharmaceuticals, today announced results from a post-hoc analysis of patient data from the Company’s Phase 3 clinical trial (NEO3-06) of Lymphoseek in head and neck cancer. The ability of Lymphoseek to localize in sentinel lymph nodes is based on its ability to target specific CD206 mannose receptor sites in macrophages, a type of immune cell which resides in high concentration in lymph nodes. In the NEO3-06 Phase 3 study, Lymphoseek localization to lymph nodes showed a strong correlation with a full regional lymph node dissection and pathology analysis with a low false negative rate, a priority in identifying sentinel nodes. Lymphoseek was also observed to home preferentially to pathology-positive nodes at a higher rate than pathology-negative nodes. These results suggest that Lymphoseek not only effectively targets sentinel lymph nodes, but further that its ability to highlight tumor-positive lymph nodes may be augmented mechanistically by the recruitment of macrophages to cancer-harboring lymph nodes.
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